aidez moi merci factoriser: E = (4x - 6)² - (2x - 4)² F = (6x + 8)² - (3x - 4)² G = (4x + 5)² - 81 H = 64 - (4x - 2)² developper: I = (7x + 4) (7x -4) J= (8 - 2

bonjour

E = ( 4 x - 6 + 2 x - 4) ( 4 x - 6 - 2 x + 4)
E = ( 6 x - 10) ( 2 x - 2)

F = ( 6 x + 8 + 3 x - 4) ( 6 x + 8 - 3 x + 4)
F = ( 9 x + 4) ( 3 x + 12)
 tu fais seule G et H, ce  sont aussi des différences de carrés : 81 = 9² et 64 = 8²

I = 49 x² - 16

c'est pareil mais l'exercice inverse, ce sont des carrés donc a² - b²

Bonjour

E =  (4x - 6)² - (2x - 4)²
E = (4x - 6 + 2x - 4) ( 4x - 6 - 2x + 4)
E = (4x + 2x - 6 - 4) (4x - 2x - 6 + 4)
E = (6x - 10) ( 2x - 2)

F = (6x + 8)² - (3x - 4)²
F = (6x + 8 + 3x - 4) ( 6x + 8 - 3x + 4)
F = (6x + 3x + 8 - 4) (6x - 3x + 8 + 4)
F = (9x + 4) (3x + 12)

G = (4x + 5)² - 81
G = (4x + 5) - 9²
G = (4x + 5 - 9) (4x + 5 + 9)
G = (4x - 4) (4x + 14)

H = 64 - (4x - 2)²
H = 8² - (4x - 2)²
H = (8 - 4x - 2) (8 + 4x - 2)
H = (10 - 4x) (6 + 4x)

I = (7x + 4) (7x -4)
I = 49x² - 28x - 28x - 16
I = 49x² - 16

J= (8 - 2x) (8 + 2x)
J = 64 + 16x - 16x - 4x²
J = - 4x² + 64

K = (1 + 10x) ( 1 - 10x)
K = 1 - 10x + 10x - 100x²
K = - 100x² + 1

L = (8x + 2) (8x - 2)
L = 64x² - 16x + 16x - 4
L = 64x² - 4